研究雾化等离子体纳米粒子激光诱导白炽实验中的非白炽发射

Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19 Pub Date : 1900-01-01 DOI:10.1615/rad-19.190

S. Talebi-Moghaddam, S. Robinson-Enebeli, T. Sipkens, A. Klinkova, K. Daun

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引用次数: 0

摘要

在1064 nm激光脉冲激励下，对雾化银、商用烟尘和金纳米粒子进行了时间分辨激光诱导白炽化(TiRe-LII)实验。从雾化银纳米颗粒中检测到的TiRe-LII信号表明，观察到的信号可能来自电子中性轫致辐射，而不是白炽灯。提出了一种基于银纳米粒子的等离子体增强光电发射的新模型。电子与缓冲气体中性物质的相互作用导致激光脉冲的反向中性轫致吸收和中性轫致发射。这个新模型可以潜在地解释在TiRe-LII实验中观察到的一些异常现象，因为次级信号污染了原始的白炽信号。

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INVESTIGATING NON-INCANDESCENCE EMISSION DURING LASER INDUCED INCANDESCENCE EXPERIMENTS ON AEROSOLIZED PLASMONIC NANOPARTICLES

Time-resolved laser-induced incandescence (TiRe-LII) experiments conducted on aerosolized Ag, commercial soot and Au nanoparticles energized with a 1064 nm laser pulse. Detected TiRe-LII signal from aerosolized Ag nanoparticles suggest that the observed signal could originate from electron neutral bremsstrahlung and not of incandescence origin. A new model is proposed based on plasmonically-enhanced photoemission of electrons from Ag nanoparticles. The interaction of the electrons with buffer gas neutral species leads to inverse neutral bremsstrahlung absorption of the laser pulse as well as neutral bremsstrahlung emission. The new model could potentially explain some of the anomalies observed during TiRe-LII experiments as a secondary signal contaminating the original incandescence signal.

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Proceeding of Proceedings of the 9th International Symposium on Radiative Transfer, RAD-19

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